diff --git a/src/testUtils/noDigestPromises.js b/src/testUtils/noDigestPromises.js
index a86d7333adc2..4b57a52f0ace 100644
--- a/src/testUtils/noDigestPromises.js
+++ b/src/testUtils/noDigestPromises.js
@@ -1,6 +1,8 @@
 var Bluebird = require('bluebird');
 require('ui/promises');
 
+Bluebird.longStackTraces();
+
 /**
  * replace the Promise service with Bluebird so that tests
  * can use promises without having to call $rootScope.apply()